Light and heavy composite calcium carbonate mixing and stirring device

Abstract

The light and heavy composite calcium carbonate mixing and stirring device comprises a stirring barrel (1), and a main stirring rod (2), a first side stirring rod (3), a second side stirring rod (4), a first bottom stirring rod (5) and a second bottom stirring rod (6) are arranged in the stirring barrel. A heavy calcium carbonate feeding barrel (7), a light calcium carbonate feeding barrel (8) and a pretreatment dispersing agent barrel body (9) are mounted at the top of the stirring barrel body; a discharge hole (10) is formed in the lower part of the stirring barrel body; and the bottom of the whole stirring barrel body is supported by a support frame (11). The side stirring rods are additionally arranged on the left side and the right side of the stirring barrel body, and the left bottom stirring rod and the right bottom stirring rod are additionally arranged at the bottom, so that light composite calcium carbonate and heavy composite calcium carbonate can be fully and uniformly stirred, the defects of stirring dead angles and poor dispersity of a traditional high-speed mixer which is singly used are overcome, and materials are fully and uniformly mixed.

Description

Technical Field

[0001] This utility model relates to a light-weight compound calcium carbonate mixing and stirring device, belonging to the field of material mixing and stirring technology. Background Technology

[0002] Depending on the processing technology, calcium carbonate can be divided into light calcium carbonate (LCC) and heavy calcium carbonate (HCC). LCC is synthesized by precipitation, produced from limestone through calcination, hydration, and carbonation. The regular crystal structure of LCC provides a certain reinforcing effect in polymer materials. However, due to the characteristics of its processing, LCC suffers from high moisture content during production and poor dispersion in downstream products, leading to problems such as bubbling and low mixing efficiency during application.

[0003] Heavy calcium carbonate is physically ground from limestone, marble, and calcite, primarily existing in blocky, sharp-angled forms. Its application in plastic systems is mainly as a filler to reduce costs. However, excessive use of ordinary heavy calcium carbonate as a filler can cause a significant loss of mechanical properties, offering no reinforcing effect. Combining light calcium carbonate with ultrafine heavy calcium carbonate in polymer materials can improve mechanical properties while addressing issues such as high moisture content, poor dispersion in downstream products, and low mixing efficiency associated with pure light calcium carbonate.

[0004] Traditional mixing of light and heavy calcium carbonate is carried out in high-speed mixers or horizontal mixers. These processes inherently create dead zones, failing to achieve uniform mixing of the two powders. These dead zones result in uneven dispersion of the light and heavy calcium carbonate, leading to poor processing stability in downstream products.

[0005] To address the issues of dead zones and uneven dispersion during the mixing process of light-weight compound calcium carbonate, it is essential to develop a mixing and stirring device for light-weight compound calcium carbonate. Summary of the Invention

[0006] The purpose of this invention is to develop a mixing and stirring device for light-weight compounded calcium carbonate to solve the problems of dead zones and uneven dispersion in the mixing process.

[0007] The technical solution of this utility model is as follows: a mixing and stirring device for heavy and light calcium carbonate, comprising a stirring cylinder, wherein a main stirring rod, a side stirring rod and a bottom stirring rod are provided inside the stirring cylinder; a heavy calcium carbonate feeding tank, a light calcium carbonate feeding tank and a pretreatment dispersant tank are installed on the top of the stirring cylinder; a discharge port is provided at the bottom of the stirring cylinder, and the bottom of the entire stirring cylinder is supported by a support frame.

[0008] The main stirring rod is located at the center line of the mixing cylinder, with its two ends installed at the center of the top and bottom, respectively. The side stirring rods include a first side stirring rod and a second side stirring rod, which are respectively installed on the radial sides of the mixing cylinder wall in the middle of the mixing cylinder. The horizontal line connecting the first side stirring rod and the second side stirring rod intersects the middle of the main stirring rod. The bottom stirring rods include a first bottom stirring rod and a second bottom stirring rod, which are respectively installed at the bottom of the mixing cylinder below the first side stirring rod and the second side stirring rod. The first bottom stirring rod and the second bottom stirring rod are perpendicular to the horizontal plane at the bottom of the mixing cylinder.

[0009] The stirring blades of the main stirring rod are in the shape of a circular figure 8; the stirring blades of the first side stirring rod and the second side stirring rod are the same and are in the shape of a square figure 8; the stirring blades of the first bottom stirring rod and the second bottom stirring rod are the same and are in the shape of a spindle.

[0010] One end of the main stirring rod is externally connected to a main stirring rod drive motor; one end of the first and second side stirring rods are respectively externally connected to side stirring rod drive motors; the lower parts of the first and second bottom stirring rods are respectively externally connected to bottom stirring rod drive motors. The main stirring rod drive motor, the side stirring rod drive motors, and the bottom stirring rod drive motors are all connected to a controller, which can adjust the stirring speed of the drive motors in different stirring zones according to process requirements.

[0011] The heavy calcium carbonate feed port is located on the top left side of the mixing drum, and is connected to the heavy calcium carbonate feed tank located at the top layer of the mixing drum via an automatic weighing scale; the light calcium carbonate feed port is located on the top right side of the mixing drum, and is connected to the light calcium carbonate feed tank located at the top layer of the mixing drum via an automatic weighing scale; the pretreatment dispersant tank feed port is located on the top right side of the mixing drum near the light calcium carbonate feed port, and is connected to the pretreatment dispersant tank via a pipe.

[0012] The beneficial effects of this invention are as follows: By adding side stirring rods on both sides of the mixing tank and bottom stirring rods on both sides, the light and heavy calcium carbonate can be thoroughly and evenly mixed, overcoming the shortcomings of traditional high-speed mixers that suffer from dead zones and poor dispersion. This achieves thorough and uniform mixing of the materials. The device optimizes the design of the stirring rods and blades, employing a main stirring rod with round figure-eight blades, side stirring rods with square figure-eight blades, and bottom stirring rods with spindle-shaped blades. Different stirring rods target different areas with varying material dispersion, ensuring thorough mixing. Furthermore, the stirring speed can be set differently in different mixing zones, creating a continuous mixing state between light and heavy calcium carbonate with stable dispersion. The device is easy to operate and highly automated: the entire operating system uses frequency conversion speed control, making operation simple and continuous from feeding to discharging. The device uses a fully sealed system, resulting in virtually no dust emissions, protecting the production environment and the health of production personnel. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a light-weight compound calcium carbonate mixing and stirring device according to the present invention;

[0014] Figure 2 Schematic diagram of the main stirring rod;

[0015] Figure 3 Schematic diagram of the side stirring rod;

[0016] Figure 4 This is a schematic diagram of the bottom stirring rod;

[0017] In the diagram, 1 is the mixing tank; 2 is the main stirring rod; 3 is the first side stirring rod; 4 is the second side stirring rod; 5 is the first bottom stirring rod; 6 is the second bottom stirring rod; 7 is the heavy calcium carbonate feeding tank; 8 is the light calcium carbonate feeding tank; 9 is the pretreatment dispersant tank; 10 is the discharge port; and 11 is the support frame. Detailed Implementation

[0018] The specific embodiments of this utility model are as follows: Figure 1 As shown.

[0019] This embodiment of a light and heavy calcium carbonate mixing and stirring device consists of a stirring cylinder 1, a main stirring rod 2, a side stirring rod, a bottom stirring rod, a heavy calcium carbonate feeding tank 7, a light calcium carbonate feeding tank 8, and a pretreatment dispersant tank 9.

[0020] In this embodiment, the mixing cylinder 1 is vertically installed on the ground. The mixing cylinder is a cylindrical stainless steel cylinder with a diameter of 1.8m and a height of 2.2m. The main stirring rod 2 is installed inside the mixing cylinder 1 along the center line. The stirring blades of the main stirring rod have a figure-eight structure. The blades of the main stirring rod 2 are 30cm from the bottom of the cylinder and 50cm from the top of the cylinder. The outside is connected to the drive motor through the stirring rod.

[0021] In this embodiment, a support frame 11 is set on both sides of the bottom center line of the mixing cylinder 1, 40cm away from the edge; a discharge port 10 is set on the right side of the bottom center line of the mixing cylinder 1, 60cm away from the edge, with a discharge port diameter of 10cm and a movable baffle is set at the discharge port.

[0022] In this embodiment, a calcium carbonate feeding port with a diameter of 10cm is set at the top left side of the mixing cylinder 1, 50cm away from the calcium carbonate feeding tank. The calcium carbonate feeding port is connected to the calcium carbonate feeding tank 7 at the top of the mixing cylinder through an automatic weighing scale. A light calcium carbonate feeding port with a diameter of 10cm is set at the top right side of the mixing cylinder 1, 50cm away from the light calcium carbonate feeding tank. The light calcium carbonate feeding port is connected to the light calcium carbonate feeding tank 8 at the top of the mixing cylinder through an automatic weighing scale. A pretreatment dispersant tank feeding port with a diameter of 5cm is set at the top right side of the mixing cylinder 1, 30cm away from the pretreatment dispersant feeding tank. The pretreatment dispersant tank 9 is connected to the pretreatment dispersant tank 9 through a pipe.

[0023] The side stirring rod in this embodiment includes a first side stirring rod and a second side stirring rod; the bottom stirring rod includes a first bottom stirring rod and a second bottom stirring rod.

[0024] A first side stirring rod 3 and a second side stirring rod 4 are installed on the left and right sides of the cylindrical edge parallel to the center line of the mixing cylinder 1 and the main stirring rod 2, 1m from the top and 80cm from the bottom. The stirring blades of the side stirring rods are shaped like a square figure 8. The side stirring rods are parallel to the bottom of the mixing cylinder and are composed of two squares with a side length of 10cm. They are made of stainless steel. The intersection of the two sides of the side stirring rods is close to the edge of the mixing cylinder 1 and is externally connected to a drive motor. A first bottom stirring rod 5 and a second bottom stirring rod 6 are installed on the left and right sides of the bottom center line of the mixing cylinder 1, 30cm from the left and right edges. The stirring blades of the bottom stirring rods are shaped like spindles. The bottommost point of the bottom stirring rod blade is 10cm from the bottom of the cylinder. The total length of the blades is 20cm. The widest part in the middle is 10cm and the narrowest part symmetrically at the top and bottom is 6cm. They are made of stainless steel and are externally connected to a bottom stirring drive motor.

[0025] This embodiment adds side stirring rods on both sides of the mixing tank and bottom stirring rods on both sides, ensuring thorough and uniform mixing of light and heavy calcium carbonate. This overcomes the shortcomings of traditional high-speed mixers, which suffer from dead zones and poor dispersion, achieving thorough and uniform mixing of materials. The device in this embodiment optimizes the design of the stirring rods and blades, employing a main stirring rod with circular figure-eight blades, side stirring rods with square figure-eight blades, and bottom stirring rods with spindle-shaped blades. Different stirring rods target different areas with varying material dispersion, ensuring thorough mixing. Furthermore, the stirring speed can be set differently in different mixing zones, resulting in a continuous mixing state between light and heavy calcium carbonate, ensuring stable and uniform dispersion.

Claims

1. A light-heavy composite calcium carbonate mixing and stirring device comprising a stirring barrel body, characterized in that, The stirring barrel is internally provided with a main stirring rod, a side stirring rod and a bottom stirring rod; the top of the stirring barrel is provided with a heavy calcium feeding barrel, a light calcium feeding barrel and a pretreatment dispersant barrel; the lower part of the stirring barrel is provided with a discharge port, and the bottom of the whole stirring barrel is supported by a support frame; The main stirring rod is located on the center line of the stirring barrel and is respectively installed at the top and bottom centers; the side stirring rod comprises a first side stirring rod and a second side stirring rod, which are respectively installed on the radial two sides of the stirring barrel wall in the middle part of the stirring barrel, and the horizontal line of the first side stirring rod and the second side stirring rod intersects with the middle part of the main stirring rod; the bottom stirring rod comprises a first bottom stirring rod and a second bottom stirring rod, which are respectively installed below the first side stirring rod and the second side stirring rod at the bottom of the stirring barrel, and the first bottom stirring rod and the second bottom stirring rod are perpendicular to the horizontal plane of the bottom of the stirring barrel.

2. The light-heavy composite calcium carbonate mixing and stirring device according to claim 1, characterized in that, The stirring blade of the main stirring rod is in the shape of a circular 8; the stirring blades of the first side stirring rod and the second side stirring rod are the same and are in the shape of a square 8; the stirring blades of the first bottom stirring rod and the second bottom stirring rod are the same and are in the shape of a spindle.

3. The light-heavy composite calcium carbonate mixing and stirring device according to claim 1, characterized in that, The heavy calcium feeding port is arranged on the left side of the top of the stirring barrel, and the heavy calcium feeding port is connected with the heavy calcium feeding barrel located on the highest layer of the stirring barrel through an automatic metering scale; the light calcium feeding port is arranged on the right side of the top of the stirring barrel, and the light calcium feeding port is connected with the light calcium feeding barrel located on the highest layer of the stirring barrel through an automatic metering scale; the pretreatment dispersant barrel feeding port is arranged on the right side of the top of the stirring barrel near the light calcium feeding port, and the pretreatment dispersant barrel is connected through a pipeline.

4. The light-heavy composite calcium carbonate mixing and stirring device according to claim 1, characterized in that, One end of the main stirring rod is externally connected with a main stirring rod transmission motor; one end of the first side stirring rod and the second side stirring rod is respectively externally connected with a side stirring rod transmission motor; the lower part of the first bottom stirring rod and the second bottom stirring rod is respectively externally connected with a bottom stirring rod transmission motor.

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